Linotype-machine.



mvmimif I K H I i 4T0 Mfr 110.7%,843. I PATENTED AUG. 8, 1905.

D. s. KENNEDY.

- .LINOTYPE MAGHINE.

AIPLIOATION FILED DBO. 24, 1904.

WITNESSES. IIVI/ENTOR United States to P. T. Dodge, No.

plicable r ing, respectively,

-thereto.

, ciprocating reeds or UNITED STATES PATENT OFFICE.

DAVID'S. KENNEDY, OF BROOKLYN, NEW YORK, ASSIGNOR TO THALER LINOTYPE COMPANY, A CORPORATION OF NEW YORK.

LINOTYPE-MACHINE.

Specification of Letters Patent.

Patented Aug. 8, 1905.

Application filedDeoember 24, 1904. Serial N 0. 238,186.

T0 aZZ whom it may concern.-

Be it known that I, DAVID S. KENNEDY, of Brooklyn, county of Kings, and State of New York, have invented a new and useful Improvement in Linotype-Machines, of which the following is a specification.

This invention has reference to an improvement'in the keyboard mechanism used in the commercial linotype-machine of the presentv day and represented in Letters Patent of the 530,931, being to insure the object of the invention under all condispeedy action of the parts tions. 7 H

It consists in a spring attachment for depressing the yp es or levers in which the key: board-cams are ca ried, the device being apto machines alreadyin use without requiring any alteration therein.

Referring to the'drawings, Figures 1 and 2 represent vertical cross-sections from front to rear through the keyboard mechanism with my improvements appiied, the figures showthe parts in' different posiperspective view of the end yokes with a spring applied tions. Fig.3isa of' oneof the Referring to the drawings," A represents the main frame, and B one of the vertically-rebars urged constantly downward by a spring O and requiring to be lifted in order that its upper end may actuate one of the magazine-escapements to release the matrices one at a time.

D is a vertically-vibrating yoke or arm mounted at one end on a horizontal pivot d and serving to lift the reed B.

E represents an eccentric mounted in a slotted yoke on a transverse pivot 0. This cam is peripherally grooved and provided with a transverse pin (2', which bears normally against a fixed stop-pin a on the frame, whereby the eamisfor the time being prevented from turningforward in the direction of the arrow,

as it has a tendency to do, because of the preponderance of weight on one side.

F is a constantly-rotating rubber-covered ,ro ll extending transversely across the entire keyboard and under the corresponding number of cams E.

G is an angular dog mounted ona horizon-- tal pivot g and arranged to engage at its'upper extremity beneath one end of the yokeD in order to maintain the same in the posltion L the cam shown in Fig. l with the cam E clear of the r0?I and its pin 6' against the stop-pin a.

is the main frame, its upper end engaging the dog G and its lower end engaging the fingerkey I, pivoted at Y The parts stand normally in the positions shown in Fig.1, the roll F in motion and the other-parts at rest. When the finger-key is actuated, the bar H throws the upper end of the dog G out from under the yoke, which thereupon falls to the position shown in Fig. 2, carrying cam E downward with it. The effect of this action is to carry the pin 6 clear of the stop, so that the ward, while at the same time it is permitted to bear upon and frictionally engage the roll. The rotation of the roll imparts motion to E, which for the time being sustains the yoke. Owing to the eccentricity of the cam, its rotation while bearing on the roll has the effect of lifting the yoke above its original level, so that it in turn lifts the reed B and effects the release of the matrix. During this action the dog G resumes its original position and arrests the yoke at its original level, the cam being at the same time arrested and held byibestop-pin a.

The construction and operation of the foregoing parts so far as described are the same as in, the standard linotype machine. In practice it is occasionally found that through the fouling of the parts due to neglect the yoke gin its action with the speed required to meet the demands of very rapid operators. To overcome this difficulty, I provide a spring K, adapted to be secured to the cam-yoke D near its pivot. This spring extends downward and bears at its lower extremity against the fixed bar a of the frame, its effect being to urge the free end of the cam-yoke'downward, so that the cam falls with great rapidity when the yoke is released from the dog G; This spring may be variously formed; but I prefer to construct it, as showniin the drawings, of a single piece of metal, having a narrow depending spring-arm and the upper portion bent into triangular formand adapted to be projected through the end of the yoke and sprungaroupd the same in the manner shown in the several figures. Aspring thus formed ing n position it retains a firm hold on the MERGEN- a vertically sliding bar mounted in,

cam is free to turn foror from other causes f D fails to fall and beyoke, the strain tending to keep it in place rather than to displace it.

It is to be observed that in my structure the spring K is interposed between the yoke and a stationary or resisting part of the frame, so that the spring acts directly toefiect the depression of the yoke and the consequent fall of the cam to itsoperative position.-

A spring applied to depress the yoke carrying the cam, as in the present organization, ser es not only to insure the descent of the yoke promptly, but also to insure an instantaneous and firm engagement between the cam and the underlying driving-roll. In practice it is found that when the rolls become smooth or burnished on the surface there is sometimes a hesitation on the part of the cam and consequent delay in the delivery of the matrix from the magazine. This trouble is eliminated by the employment of the spring. i

Having thus described my invention, what I claim isit. In a keyboard mechanism of the class herein shown, the combination of a movable 796,843 g a f yoke D, and the cam therein, an underlying roll, and a spring acting to move the yoke toward the roll, whereby the prompt and positive engagement of the cam with the roll is insured.

2. In a keyboard mechanism of the type spring, K, bent around one end of the same and held by its own elasticity.

In testimony whereof I hereunto set my hand, this 22d day of December, 1904, in the presence of two attesting witnesses.

DAVID SKENNEDY. Witnesses:

JOHN R. ROGERS, JAcoB B. BUCKLEY. 

